Saw.



'PATENTED OCT. 15, 1907.

A. J. VELANDER.

SAW. APPLICATION FILED JULY 18, 1906.

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No. 868,509. l PATENTED OCT. 15, 1907. I

A. J. VELANDE-R.

SAW.

APPLIUATION FILED JULY 13.1905.

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ALFRED J. VELANDER, OF KNOXVILLE, ILLINOIS.

SAW.

To all whom it may concern:

Be it known that I, ALFRED I. VELANDER, a citizen of the United States, residing at Knoxville, in the county of Knox and State of Illinois, have invented new and useful Improvements in Saws, of which the following is a specification.

This invention relates to saws, being especially directed to an improved power attachment for driving the saw in one direction, and has for its objects to produce a comparatively simple, inexpensive device of this character which may be conveniently attached to the saw and arranged for operating the same, one whereby the saw will be automatically driven in its cutting direction, and one whereby the outer spring may be quickly adjusted at will for regulating the driving force imparted to the saw.

With these and other objects in view, the invention comprises the novel features of construction and combination of parts more fully hereinafter described.

In the accompanying drawings: Figure l is a side elevation of a saw equipped with an attachment embodying the invention and showing the same in position for use. Fig. 2 is a similar view as seen from the other side of the casing. Fig. 3 is a horizontal sectional view taken Centrally and longitudinally through the spring receiving casingon the line 3-3 of Fig. I. Fig. 4 is a cross section taken on the line ait of Fig. 2. Fig. 5 is an elevation showing a slightlydiffercnt embodiment of the invention. Fig. G is a section taken centrally and longitudinally through the casing. Fig. 7 is a cross section taken on line 7-7 of Fig. 6.

Referring to the drawings, l designates a saw provided along one edge, as usual, with teeth 2 and having at one end a handle 3 adapted to be grasped for operating the saw, the other end of whichis connected by a cable or other flexible element 4 with a power spring 5 arranged within a tubular casing 6 having a cap 7 rotatively fitted onto its rear end and provided at irs forward end with a pair of downwardly extending ground engaging members or arms S having their normally lower ends sharpened as at 9, there being formed adjacent the rear end of casing 6, a lateral rearwardly opening tubular portion or throat l() through which the cable 4; plays, as more fully hereinafter explained.

Formed on the cap 7 and extending into the casing 6 I is a conical tensioning head Il -which enters the adjacent end of the spring 5 and is provided at its forward end with a cross-piece or arm l2 arranged to travel in the coils of the spring during rotation of the cap, while journaled at the forward end of the casing is a grooved guide pulley I3 on which the cable 4 is arranged to travel during operation of the saw, the pulley being preferably located at a point adjacent the forward end of the tubular portion l0, whereby the cable may piay freely through the mouth of said portion and will dur- Speceation of Letters Patent.

Application tiled July I8,

Patented Oct. 15, 1907. 1906. Serial No. 326,787.

j ing rearward movement of the saw exert traction in a direct axial line on the spring 5 in expanding the same.

The casing 6, which is provided in its side wall opposite the pulley 13 with a door 14 designed for normally closing and opening, through which access may be had to the pulley for lubricating or other purposes, has attached to its front side at a point adjacent its rear end a guide strip 15.designed to guide the'saw in its movements, there being also attached to the top wall of the casing a bell 16 adapted for the reception of a strap or the like through the medium of which the device may be conveniently transported, while the cable 4 has its inner end attached to a conical block or head vided with a transverse engaging piece or pin I8 engaged between the coils of the spring.

Pivoted to the rear side of the casing at a point adjacent its rear end by means of a pivoting member I9 is a pair of coperating log-engaging members or clamps 20, 2]., of which the former has at its forward 'end a rearwardly curved sharpened spur 22 and is provided on the upper edge of its shank portion with teeth 23 adapted for engagement by a pawl 24 pivoted to the clamping member 2l, which latter is formed at its upper end with a hand piece 25 and at its lower end with a forwardly curved, sharpened engaging portion or spur 26. The clamping member 20 has its shank provided with a plurality of relatively spaced openings 27 through any one of which the pivoting member 19 may be entered in attaching the clamps, thus to permit relative adjustment of the members to effect a proper initial position of the sharpened engaging portions 22, 26, toward or from each other.

In practice, the device is set up for use by planting the lower sharpened ends of the arms 8 into the ground and embedding the engaging portions or spurs 22, 26 of the clamping members into the log for holding the casing and saw in proper position on the latter. In operating the saw, the handle 3 is grasped and the tool drawn rearwardly, thereby exerting traction on the cable 4 for expanding spring 5, and after the blade has reached the limit of its rearward movement it is pressed downward on the log and moved forward, this action being effected through the medium of the spring 5 in contracting, it being understood, of course, that the cutting of the log is accomplished during orward movement of the saw. v

It will be observed that by turning the cap 7 the cross piece l2 will act in the coils for lengthening and shortening the spring according to the direction of rotation of the cap, thus to increase or decrease the tension of the spring and consequently its force or power.

In the form of device illustrated in Figs. 5, 6 and 7, the saw is arranged for operation in connection with a saw horse or buck 28, to the upper end of one bar of which the upper end of casing 6 is attached, as at 29,

I7 entered into the adjacent end of the spring and pro-r cept that in this torni the spring 5/ extends throughout the entire length oi the casing, the cable 4 being ex-Y tended centrally through the spring and attached to a i block 17 which is in turn engaged with the coils ot the spring at a point near its rear end, whereby in the operation of the saw the spring will upon rearward inovcnient. of the latter be compressed as distinguished iroin the expansive action of the spring as shown in the iorni at iirst described.

Having thus described my invention, what l. claim is:

l. In a device of the class described, the combination of a casing forming a support, a saiv slidably mounted thereon, a spring 'housed in the easing. a guide pulley at one end of the casing, a lleXible element passing around the pulley and extending into the casing,r and having its ends connected With a saw and the spring, clamps secured to the casing for gripping a log, and legs at the opposite end of the casing, and a handle for operating the saw connected with the end thereof adjacent the clamping means.

2. ln a device of the class described, the combination of a hollow casing forming the body of the device and having a lateral opening adjacent one end, a helical spring mounted in the easing and secured at one end, a flexible element extending longitudinally into the casing and attached to the free end oi the spring, means at the said opening around which the flexible element moves bach and forth, a

' saw disposed parallel with the body and shorter than the latter, the outer end of the said element being connected with the saw, and a handle on the saiv at the end thereof opposite from that connected with the element, the saw being free to move longitudinally and laterally in a plane parallel to the axis of the casing.

2E. In a device of the class described, the combination of a hollow inelnber, lugs at one end thereof, gripping iaws at the opposite eudfa helical spring, an adjustable means for varying the number of active coils of the spring, a pulley mounted on the member, a saw disposed along one side et the ineinher and guided thereon, and a tlexibleelement passing over'the pulley and connected at its end with a saw and spring.

In testimony whereof, l aihx my signature in presence of two witnesses.

ALFRED J. VELANDER.

Witnesses L. C. WILSON, R. B. CoLLiNs. 

